I had a few more ideas for horned forms.

Bruising butt - allows forms that butt opponents to bruise and effect them with an occasional soften like effect.

Armor piercing horns - Allows horned forms that charge to bypass armors similar to the armor piercing needles of an invoker. Not with ever hit but the occasional one.

Clawed swipe - Clawed forms that can swipe away weapons from an enemy can occasionally rip the hand with the claws and prevents the victim from re-wielding for a few ticks.

Focus of the predator - These beasts are harder to distract by others rescuing their victim. Less chance of a rescue on someone being successful.